The M/V Susitna is an Office of Naval Research (ONR) platform demonstrating variable geometry/variable draft capability in a twin hull marine vessel. Tests and trials of this first of class vessel will demonstrate its ability to operate as a deep draft, high speed vessel capable of carrying large payloads in high sea states with a stable ride, then transition to a shallow draft, beachable, landing craft mode capable of delivering Expeditionary Forces to the beach. M/V Susitna is an ice strengthened, twin hulled marine vessel.